catalytic functionalities of ru ni and ag catalysts supported on activated carbons synthesized from rice straw

Abstract

Activated carbons are prepared from Rice straw by utilizing (NH4)2HPO4 as an activating agent. The consequence of various conditions during pre-treatment on textural properties like surface area, pore volume, average pore size diameter and catalytic functionalities are estimated. These activated carbons are utilized as supports for Ruthenium metal and the catalysts UR-0, Ru/C-UR0-1, Ru/C-UR0-3, Ru/C-UR0- 5, Ru/C-UR0-7 (end numerical shows wt. % of Ru) are prepared. The activities of the catalysts are considered for glycerol hydrogenolysis. Highest conversion of glycerol is found at 5 wt. % of Ru, consequently the same wt. % is loaded on further activated carbon supports and other catalysts Ru/C-UR1-5, Ru/C-UR2-5, Ru/C-UR3-5 are also prepared. All those catalysts were subjected for characterization of surface area, pore volume, X-ray diffraction, and TEM studies. Highest surface area shows by Ru/C- UR3-5. Among these catalysts maximum activity was found for Ru/C-UR3-5. newlineActivation of biochar derived from rice straw by using (NH4)2HPO4, KOH, HNO3, H3PO4, KMnO4 reagents by altering surface properties is done. Activated carbon with the highest surface area is used for the preparation of Ruthenium bi-functional catalyst for hydrogenolysis of glycerol. Among all the catalysts studied, Ru/CUR3-5 shows maximum activity. The effect of solid acid co-catalyst on the activity of Ru/C catalysts was investigated by using a selection of metal oxides such as TiO2, Nb2O2, and ZrO2, etc. The activity of the Ru/C catalyst in the presence of TiO2 results in better glycerol conversion. The effect of the mass of Ru/C and TiO2 on the conversion of glycerol is also being considered. When the wt. of catalyst and acid co-catalyst increase glycerol conversion rate to 1, 2 PDO also improved. newlineActivated carbons are planned for metal impregnation the usage of Rice Straw. newline newline